The piece people ask about most
The ASICS Core Windrunner is the priciest thing in the core range and the one that generates the most questions. Not because it is complicated, but because there are four different ways to buy it and the number on the price tag moves depending on which route you take.
So this post lays the ladder out plainly: the windrunner on its own, the Windrunner Set, the Windrunner Tracksuit and the Tri-Sets. If you want the wider view of how the range fits together first, the complete ASICS sets buying guide for UK shoppers covers everything. Otherwise, stay here and we will sort the windrunner question out properly.
We will also cover how it sits over a set, when to size up, and which colourway to live with.
What a windrunner actually is, and why it works in the UK
A windrunner is a light shell jacket. It is not a coat and it is not a waterproof. It is the layer you pull on when the wind picks up, when the sun goes in at six o'clock, or when you want a bit of shape over a plain tee. It packs down small enough to shove in a bag, which is the whole point of it.
That description happens to match the British calendar almost exactly. We do not get long stretches of proper cold or proper heat. We get eight months of "bring a jacket, you might not need it". A Black Core Windrunner handles April through October on its own, then works as a mid-layer under a heavier coat from November.
The other reason it earns its place: it goes over everything. Tee, half-zip, jumper, a full coordinated set. To see how it sits next to the rest of our outerwear, browse the jackets and coats collection.
For the exact fabric spec and any weather rating, check the product page.
The four ways to buy the ASICS Core Windrunner
Here is the ladder, cheapest to dearest. Prices correct at time of writing.
| What you get | Product | Price |
|---|---|---|
| Jacket only | 'Steel Grey' Core Windrunner (reduced) | £59.99 |
| Jacket only | Black Core Windrunner | £89.99 |
| Two pieces | Black Core Windrunner Set | £129.99 |
| Two pieces | 'Steel Grey' Core Windrunner Tracksuit | £149.99 |
| Three pieces | Black Core Windrunner Tri-Set | £154.99 |
| Three pieces | 'Steel Grey' Core Windrunner Tracksuit Tri-Set | £174.99 |
Sets are sold as coordinated pieces, designed to be worn together straight out the bag. Tri-sets add a third piece so you have the jacket, the top underneath and the bottoms in one go.
Which windrunner buy is right for you
- You already own black joggers and tees. Buy the jacket on its own. The Steel Grey at £59.99 is the obvious one to grab.
- You want a matching top and bottom. The Windrunner Set at £129.99 is the entry point.
- You want the full co-ord and you wear this stuff most days. Tri-Set. The maths is below and it is not close.
- You want a tracksuit top rather than a shell. Look at the Black Core Tracksuit instead, and read our breakdown of how a tracksuit differs from a two-piece set before you commit.
How to wear a windrunner over a set
The easiest fit in the range is a windrunner over a matching t-shirt set. You get three layers of the same family, so the proportions do the work. Zip it half way, leave the tee visible at the chest, done.
Two combinations that work every time:
- Black windrunner over the Black Core T-Shirt Set. All black, sharp, and it does not read as gym kit.
- Black windrunner over the 'Smoke Grey' Core T-Shirt Set at £69.99. The grey underneath stops the black going flat.
Keep the jacket open if the set has any print or contrast detail at the chest. Closed, you lose the set entirely and it just looks like a jacket and joggers. If you want more outfit ideas built around a small number of pieces, our guide to building a five-piece ASICS capsule wardrobe shows how far a windrunner stretches. And the full fits collection pairs sets with trainers if you would rather have it decided for you.
Layering and sizing: when to size up
A windrunner is meant to go over things, so it is cut with some room already. Most people should take their normal size. Size up one if:
- You plan to wear it over a hoodie or a chunky jumper through winter.
- You want the boxy, dropped-shoulder look rather than a clean line.
- You are between sizes and you carry width across the shoulders.
Stay true to size if it is going straight over an ASICS Black Core T-Shirt or the Black Core Half-Zip at £39.99. Both are thin enough that a bigger jacket just hangs off you. Sizing up costs you the shoulder line, and the shoulder line is most of why the jacket looks good.
If you have only ever bought Nike or Under Armour, the fit will not map across one for one. Our ASICS sizing comparison against Nike and Under Armour is worth five minutes before you order.
Steel Grey vs Black: which colourway to live with
Black is the safer buy. It goes with everything you already own, it hides a wet bus stop, and it works with almost any trainer. Pair it with the Black Core Woven Pant at £54.99 and you have a fit that passes at work, at the pub and on a plane.
Steel Grey is the better looking one, honestly. It reads softer, it shows the cut of the jacket more clearly, and it stops an all-black wardrobe getting monotonous. It also sits perfectly with the 'Steel Grey' Core Woven Pant at £39.99 for a tonal grey fit, or over a black tee for contrast.
The practical answer: if this is your only light jacket, buy black. If you already have a black shell in the wardrobe, buy Steel Grey while it is £59.99. Same jacket, thirty quid apart. Layer either over something from the half-zips collection when it turns.
The tri-set value case
This is where the ladder stops being confusing and starts being obvious.
Buy the Black Core Windrunner at £89.99 and the Black Core T-Shirt Set at £74.99 separately and you are at £164.98 for three pieces. The Black Core Windrunner Tri-Set gives you three pieces for £154.99. You save money and you get pieces that were designed to sit together, rather than a jacket you hope matches.
Same logic further up. The Black Core Tracksuit Tri-Set at £174.99 against the tracksuit at £149.99 plus a tee at £34.99 is another win, and the Steel Grey Windrunner Tracksuit Tri-Set works out the same way.
The only reason not to buy a tri-set is if you genuinely would not have bought the third piece. If you were only ever going to wear the jacket, buy the jacket. But if the tee was going in the basket anyway, the tri-set is the cheaper route. Browse the whole lot in the tracksuits collection.
Your windrunner, month by month
- April to May. Over a tee, zipped to the chest. The main event.
- June to August. Rolled in a bag for the evening. Warm days turn cold here at about eight o'clock and everyone forgets. Pair it with something from our lightweight summer ASICS picks.
- September to October. Peak windrunner season. Over a half-zip, over a set, over anything.
- November to February. Mid-layer. It goes under a proper coat without bulking you out, which a hoodie does not.
- March. Back out on its own the first decent day, which is usually a Tuesday and usually a lie.
Quick answers
Is the ASICS Core Windrunner waterproof?
Treat it as a wind and shower layer rather than a waterproof. For the exact spec, check the product page before you buy.
Should I size up in a windrunner?
Only if you are layering over a hoodie or jumper, or you want a boxier fit. Over a tee or a half-zip, take your usual size.
What is the difference between a Windrunner Set and a Windrunner Tri-Set?
The set is two coordinated pieces at £129.99. The tri-set adds a third piece, so jacket, top and bottoms, from £154.99.
Which windrunner colour should I buy first?
Black, if you own nothing like it. It works with more of your wardrobe. Steel Grey is the one to add second, and it is currently the cheaper of the two.
Ready to buy?
If you want one piece that carries you from April to October and still earns its keep in January, this is it. Start with the jacket if you already own the bottoms, or go straight to a tri-set if you want the whole fit sorted in one order.
Everything sits in the ASICS collection, from single windrunners through to the three-piece options. Free UK delivery on orders over £100, which every windrunner set and tri-set on this page clears comfortably, and same day dispatch so it can be on you this week.